Cross wound cop winding machine



14, 1943. w. SCHWEITR 2,336,963

CROSS WOUND COP WINDING MAl-IIIIEv Filed Sept. 20, 1941 2 Sheets-Sheet 1 bec. 14, 1943. w, scHwr-:ITER 2,336,963

CROSS WOUND COP WINDING MACHINE Filed Sept. 20, 1941 4 2 Sheets-Sheet 2 Patented Dec.` 14, 1943 CROSS WOUND COP WINDING MACHINE Walter Schweiter, Horgen, Switzerland Application September 20, 1941, Serial No. 411,643-

i In Switzerland October 2, 1940 I Cl. 242-18) '7 Claims.

ence and diameter thereof respectively. The relationship between the number of strokes made by the yarn guide and the number of revolutions of the cop being wound consequently varies constantly and goes onlincreasing, reaching sometimes even whole gures, e. g., 1:2, 1:3 and so on.

At the times when such wholegure ratios exist,

each successive turn of yarn is laid exactly on top of the preceding one, so that spiral ribsor other patterns are produced which not only result in non-circular cops, but even give'rise to trouble' when the yarn is unwound from the cop.

In order 'to avoid the formation of such ribs and patterns, various so-called disturbance gearings have already been proposed, the purpose of said gearings -being to alter continually the ratio between the number of strokes made by the yarn guide and the number of revolutions of the frictionfroller'in a rapid periodic cycle. ,It has been found that such disturbance gearings reliable working of which must be ensured under all circumstances.

The chief object of the present invention is to provide an improved and efficient disturbance gearing for cross wound cop winding machines which will eiectively prevent the formation of patterns and ribs on the cops being wound.

In order that this invention may be the more clearly understood and readily carried into effect, we will proceed to describe the same with reference to the accompanyingdrawings, which illustrate by way of example and not of limitation one convenient embodiment of the present invention, and in which:

Figure 1 is a section through the worm wheel drive of a cop winding apparatus.

Figure 2 is a section on the line II-IAI of Fig-v ure 1. v

Figure 3 is a section on the line III-III of Figure 2.

Figure 4 shows details of components of the disturbance gearing.

Figure 5 is a section on the line V-V of Figure 2 through the yarn guide driving mechanism,

and

vFigure 6 is a plan view of the yarn guide and its sliding surface with the cover removed.

Referring now to the drawings, a driving shaft I isfmounted in suitable bearings in a gear box 2 and is driven in any desired manner, for example, by means of a belt pulley 3 and a driving belt Il. shaft I within thevgear box, being provided with an elongated drivepin B. Alsov mounted on vthe driving shaft I are two Worm wheels 1 and 8 which are rigidly connected together so as to form a unitary structure, the arrangement being such that the said unitary structure is axially slidable en the driving shaft as a sleeve. Such sleeve is splined'to the shaft by havingV a bore 9 parallel withlthe driving shaft I'into which, the pin 6 takes so as to transmit the rotation of the driving shaft to the two worm wheels. The

' threads on the two worm wheels 1 and 8 are of .form a very important part of the machine, the

opposite hand, that is to say, if the threads of the worm wheel 'l are lefthanded,.the threads of the worm' wheel 8 are right-handed, and vice The worm wheel 1 engages with a worm wheel I 0 mounted on a shaft II carried in bearings in the gear bfox, the gear wheel I0 being secured to the shaft II by means of a nut I2. On that portion I3 of the shaft II which projects outside the gear box 2 is mounted the means for rotating the cop so as to wind the yarn on it, and which in this case is a winding'roller I5 secured to the shaft by means of a nut I4. The worm wheel 8 engages with a worm wheel I8 mounted on a shaft I'l carried in bearings in the gear box, the said shaft I'I having secured thereto the yarn guide traverse mechanism which is represented by a cam cylinder I8 which is housed in an extension I9 of the Vgear box 2.. The extension- I9 is provided in its top with an elongated slot 2l! (Figure 6) in which a hub 2| on a yarn -guide plate 22 is guided. In this hub 2l is mounted the pin 23 ofa sliding block 24 which is guided in grooves 25 in the cam cylinder I8 and so derives a backward and forward movement therefrom. Thus the cop-rotating mech# anism and the yarn guide traverse mechanism are each driven by a worm or spiral gear couple, that is to say, the couple I---IIl and the couple 8-I6, and the driving members of these couples A collar 5 is mounted on the driving' are adapted for longitudinal or axial movement o n the shaft which drives them.

The yarn guide plate 22 is guided laterally by two ends 26 and 21 which are bent down at right angles and slide in a slot 23 in the part I8. The yarn guide plate 22 is also guided at the bottom and top by means of runways 29 and 30 in the extension I9, and the cover 3| thereof respectively. The spaces 32 between the runways 29 and 30 serve to trap the jets of oil which, under certain circumstances, are ejected from the gear box and the oil which collects in these spaces is returned to the gear box through holes 3,3. The cover 3l thus seals the extension I9 against 'the escape of oil. The outer end of the yarn guide plate 22 is provided with a tapering yarn guide 34 having a slot 35 in its upper surface through circular groove 43 in which runs a guide roller 44l i mounted on a'pin 45.carried by one arm 46 of a rock lever 41 (Figures v3 and 4). This rock lever 41 is mounted on a partially screw-threaded bolt 48 fixed in the gearbox 2 and has a forked upper end 49. In this forked upper end 49 and on partially screw-threaded bolts 50, ,5I is fulcrumed a yoke 52 which engages in an annular groove 53 in the hub .54 of the unitary structure formed by the two worm wheels 1 and 8. When the toothed wheel 4I rotates, the eccentric circular groove 43 imparts a rocking movement to the rock lever 41 and this is transmitted by the 1 yoke 52 to the hub 54 and so causes the unitary number of strokes made by the yarn guide and the number of revolutions of thecop'being wound even for a short time and vhence there is no chance of successive turns of the yarn piling themselves up on top of one another. 0n the contrary, the

turns of yarn on a cop produced with the aid of the gearing according to the present invention are uniformly disposed and the cops are free from patterns and ribs.

I claim:

1. In a cross wound cop winding machine, a driving shaft, a friction roller for driving the cop to be wound, a yarn guide, a cam cylinder controlling the. movement of the yarn guide, a first worm wheel operatively connected to said friction roller to drive the same, a second worm wheel operatively connectedto said cam cylinder to drive the same, said first and second worm wheels having threads of opposite hands, two further worm wheels forming a unitary structure axially slidable on said,driving shaft and engaging` one with the first worm wheel and the other with the second worm wheel to drive the same, means for rotating said unitary structure from said driving shaft whilst leaving the same free to move axially thereon and means for oscillating said unitary structure backwards and forwards on said driving shaft so that the drive to the friction roller and the drive to the cam cylinde` are continuously modified whereby the ratio between the number of strokes of the yarn guide and the number of revolutions of the friction roller is continuously varied.

k2. In across wound`cop winding machine according to claim 1, means for driving said unitary structure from the drivingshaft whilst leaving the same free to move axially thereon', comprising a collar secured to said driving shaft and a structure formed by the worm wheels 1 and 8 to be oscillated backwards and forwards Von the driving shaft I. Since the threads on the two worm -wheels 1 and 8 are of opposite hand, the

axial movement of theV saidworm wheels produces either a retardation of the worm wheel I6 and an acceleration of the worm wheel IIJ, or conversely an acceleration of the worm wheel I6 and a retardation of the worm wheel I0. The ratio ,of the drive transmissions to the cam cylinder and to the Winding roller thus varies continuously and uctuates between a maximum and minimum value.

A pillar 51 is mounted on the cove'r 55 of the gear box `2 by means of a nut 56, said pillar acting as a guide for a cop holder 58 which is held against rotation by means of a set screw 59 engaging in a groove 60. The cop holder 58 carries a cop spindle 6I on which is freely mounted a conical h'older 62 for the conical cardboard cop tube 63 which rests on the winding roll I5 and is rotated thereby. During the winding operation, the yarn 36 which is drawn from a source package, not shown, and runs over a guide rod 55is wound on to the cardboard tube 63. The cop 6.4 increases in diameter continually as it is being wound and in' so doing pushes the cop holder 58 upwardly on the pillar 51. The angular speed of rotation of the cop 64 being wound uctuatesfcontlnually between a maximum and a. minimum value, whilst .the number of strokes made by the yarn guide 34 varies inversely. It is, thereforenot possible for a whole number ratiov to exist between 'the pin carried by said collar and extending into a bore in said unitary structure parallel with the axis of the driving shaft.

3. In a cross wound cop winding machine according to claim 1, means for oscillating said unitary structure on the driving shaft comprising a double-armed rock lever, a guide roller on one arm of said lever, a driven toothed wheel having an eccentric` circular groove therein actuating said guide roller and a forked end to the other arm of said lever engaging in an annular groove in said unitary structure.

4. In a cross vwound cop winding machine acf cording to claim 1, a, gear box, an extension to said gear box housing the cam cylinder and having an Velongated slot in its upper surface, a yarn guide driving element co-operating with said cam cylinder and projecting through said slot and a cover to said extension co-operating therewith to form guides and runways for the yarn guide and to seal the extension so as to prevent the escape of oil therefrom.

5. In a cross-wind yarn winding machine having cop-rotating and yarn-traverse mechanisms driven from a common drive shaft, the improvement which comprises a spiral gear. couple in the power line from said shaft to each said mechanism and means for continually and simultaneously, axially reciprocating'l one gear of each couple in directions to accelerate and decelerate respectively the operating speeds of said mechanisms.

6. In a cross-wind yarn winding machine having cop-rotating and yarn-traverse mechanisms driven by a common drive shaft, the improvement which consists in a spiral gear couple in the power line from said shaft to each mechanism, the drivin respectively opposite directions f 2,336,963 l f lng members fsuch coubles being splined on such shaft and having `opposite hands of pitch. and means driven by such' shaft for jointly reciprocating such members in the same direction on said shaft, while in rotary operation, thereby respectively accelerating and decelerating the oper'- ating'speeds of said mechanisms in alternation.

7. In a cross-wind yarn winding machine having cop-winding and yam-guide traverse mechanisms and acommon drive shaft therefor,- of disturbance gearing connecting such shaft to' such Vmechanismscomprising'a sleeve splined onthe a shaft and bearing spiral gears of opposite pitch,

said-mechanisms having spiral gears respectively meshing therewith,l and means` driven by said 

